Language Environment uses a slash separator in the PARM to separate its run time parameters from parameters passed to the application program. You would have to search the LE documentation to see if the slash can be changed -- I have never had a need to do this so I've never searched for it.

1. Provide the EXEC statement in your JCL where you pass the PARM to your program.
2. Provide the Linkage section of your program, used to hold the PARM variables.
3. If this JCL was something which was running fine before you made any changes , please provide the code with and without your changes.

the parm string passed to the programs compiled with the more modern compilers or running in an LE environment

is divided into two parts separated by a slash "/",
one is passed and processed by the run time component of the language or LE to modify the run time environment
( for example to define the heap size , see the language and/or the LE manuals for details )
the other one is passed to the user program

according to the installation customization and the standards it is possible to nullify,avoid the run time modification

the best source of info for this issue is Your support, they knoe the customizations
that have been done and can advice on how to proceed

1. Provide the EXEC statement in your JCL where you pass the PARM to your program.
2. Provide the Linkage section of your program, used to hold the PARM variables.
3. If this JCL was something which was running fine before you made any changes , please provide the code with and without your changes.